Corkscrew



FIG. 1 is a perspective view of the corkscrew showing my new design;

FIG. 2 is a right side view thereof, the left side being a mirror image of the right side;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The broken lines shown in the drawings are for the purpose of illustrating portions of the corkscrew and form no part of the claimed design. 

CLAIM The ornamental design for a corkscrew, as shown and described. 